Department of Prosthodontics, Faculty of Dentistry, Inonu University, Malatya, 44280, Turkey.
Department of Mechanical Engineering, Faculty of Engineering, Inonu University, Malatya, Turkey.
Clin Oral Investig. 2022 Sep;26(9):5969-5978. doi: 10.1007/s00784-022-04623-6. Epub 2022 Jul 22.
The aim of this study was to evaluate the mechanical analysis of different three-unit metal-free fixed dental prostheses (FDPs) produced by computer-aided design (CAD)/computer-aided manufacturing (CAM).
A hundred stainless steel die models of a mandibular left first premolar and a mandibular left first molar were prepared. The specimens were divided into five CAD/CAM material groups (n = 20): Group ZIR, a cubic zirconia (DD cube ONE®); Group FRC, FRC resin material (Trinia); Group PEEK, a PEEK material (KERA® starPEEK); Group PEKK, a PEKK material (Pekkton® ivory); and Group COMP, a polymer composite material (BreCAM.HIPC). Compression test was applied to the specimens, and then the results were analyzed statistically using one-way ANOVA and Tukey's tests. In addition, deformation analyses in FDPs were compared with finite element method (FEM). After the compression test, the damage to FDPs was evaluated with a scanning electron microscopy.
Although ZIR (2461 ± 93.70 N) showed high fracture load values, FRC (1571 ± 35.96 N) material was found to be advantageous in terms of toughness. These were followed by PEEK (1398 ± 38.26 N), PEKK (1227 ± 44.25 N), and COMP (829 ± 32.33 N), respectively. A ductile fracture was observed in PEEK, PEKK, and FRC due to their elastic structures. The deformation properties examined by the FEM were found to be similar to the compression test.
CAD/CAM high-performance polymers and cubic zirconia material can be used in three-unit FDPs. In three-unit FDPs, the use of FRC material can be advantageous due to both biomechanics and lightness.
Metal-free CAD/CAM materials may offer new possibilities in three-unit FDPs.
本研究旨在评估通过计算机辅助设计（CAD）/计算机辅助制造（CAM）制作的不同三单位无金属固定义齿（FDP）的力学分析。
准备 100 个下颌左侧第一前磨牙和下颌左侧第一磨牙的不锈钢模具模型。将样本分为五组 CAD/CAM 材料（n=20）：组 ZIR，立方氧化锆（DD 立方 ONE®）；组 FRC，FRC 树脂材料（Trinia）；组 PEEK，PEEK 材料（KERA®starPEEK）；组 PEKK，PEKK 材料（Pekkton®ivory）；组 COMP，聚合物复合材料（BreCAM.HIPC）。对样本进行压缩试验，然后使用单因素方差分析和 Tukey 检验对结果进行统计学分析。此外，还通过有限元法（FEM）比较了 FDP 的变形分析。压缩试验后，用扫描电子显微镜评估 FDP 的损伤。
尽管 ZIR（2461±93.70 N）显示出较高的断裂载荷值，但 FRC（1571±35.96 N）材料在韧性方面具有优势。其次是 PEEK（1398±38.26 N）、PEKK（1227±44.25 N）和 COMP（829±32.33 N）。由于其弹性结构，在 PEEK、PEKK 和 FRC 中观察到韧性断裂。通过 FEM 检查的变形特性与压缩试验相似。
CAD/CAM 高性能聚合物和立方氧化锆材料可用于三单位 FDP。在三单位 FDP 中，由于生物力学和轻便性，使用 FRC 材料可能具有优势。
无金属 CAD/CAM 材料可能为三单位 FDP 提供新的可能性。
